JPH0592411U - Exhaust silencer - Google Patents

Abstract

(57) [Abstract] [Object] The present invention relates to a structure of a spark arrester for preventing emission of sparks from a tail pipe in an exhaust silencer provided in an engine, particularly a two-cycle engine. In the exhaust silencer, which is provided with a spark quarester 3 exposed inside from a tail pipe 4 of the exhaust silencer, the spark quarester 3 has a bag-like net body 1 and an opening of the bag-like net body 1. A tubular body 2 attached to the tail pipe 4, a step portion 7 formed in a part of the tail pipe 4 to prevent the bag-like net body 1 from falling off, and a screw screwed into the tail pipe 4. Between the head portion 9 of 9 and the cylindrical body 2
It is made to sandwich.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a spark arrester for preventing emission of sparks from a tail pipe in an exhaust silencer provided in an engine, particularly a two-cycle engine.

[0002]

[Prior Art]

 Conventionally, as an exhaust silencer provided with a spark arrester, there is a device described in, for example, Japanese Utility Model Publication 3-50254 or Japanese Utility Model Publication 3-50255.

Among them, in the former, that is, in the structure disclosed in Japanese Utility Model Publication No. 3-50254, as shown in FIG. 5, an exhaust silencer is provided with a spark arrester c composed of a screen a and a pipe b. Is fixed to the tail pipe d from the side with a screw e. In the latter structure, that is, the structure disclosed in Japanese Utility Model Publication No. 3-50255, as shown in FIG. 6, a spark arrester g to be inserted into the exhaust pipe f is elastically fitted into the outer surface of the exhaust pipe f. It is configured to be held by the body h.

[0004]

[Problems to be solved by the device]

 By the way, in the structure shown in FIG. 5, the spark arrester c can be attached / detached from the exhaust opening, but the screw e for attachment / detachment is orthogonal to the exhaust opening. There is a problem that it cannot be attached and detached, and in the structure shown in FIG. 6, the outer periphery of the exhaust pipe f is fixed by the cylinder h, and the spark arrester g is fixed on the inner surface of the cylinder h, so the structure is complicated However, accuracy was required, and the contact surface of each part was solidified due to corrosion, etc., making it impossible to attach and detach. In addition, there was a risk that the holding power would be inconsistent, and all of them left problems to be solved.

In view of various problems that need to be solved in the above-mentioned conventional example, the present invention provides an exhaust silencer including a spark quarester exposed inside from a tail pipe of the exhaust silencer, in which the spark quarester is , A bag-like net body and a tubular body attached to the opening of the bag-like net body, and formed on a part of the tail pipe to prevent the bag-like net body from falling off. We have proposed an exhaust silencer in which the tubular body is sandwiched between the step portion and the head of a screw screwed into the tail pipe, and in implementing the exhaust silencer, the step portion has the tubular shape. It is configured to abut against the inner end of the body, and an outward flange is formed on the outer end of the tubular body, and the flange between the step and the head of the screw is formed through this flange. The tubular body is clamped.

[0006]

[Action]

 In the exhaust silencer of the present invention having the above-mentioned structure, the spark arrester can be attached and detached from the exhaust opening side, and the attachment and detachment can be done by attaching and detaching the screw that prevents the cylindrical body of the spark arrester from coming off. In addition, the spark arrester is securely held between the step formed on the tail pipe side and the head of the screw.

[0007]

【Example】

 Next, the present invention will be described in detail with reference to the illustrated embodiment. First, in FIGS. 1 and 2, a spark arrester 3 obtained by closing one end of the bag-like net body 1 and fixing the other end to the tubular body 2 is attached to the opening 5 of the tail pipe 4 of the exhaust silencer. At the time of attaching, the step portion 7 formed in a part of the tail pipe 4 is butted against the inner end 6 of the tubular body 2.

On the other hand, at the outer end 8 of the tubular body 2, a head 10 of a screw 9 screwed into the opening 5 of the tail pipe 4 is locked, and in this way the step 7 and the screw are screwed. The tubular body 2 is sandwiched between the head 10 and the head 10 to prevent the spark arrester 3 from falling off, and if necessary, the screw 9 is loosened to easily remove the spark arrester 3. It can be removed.

Next, in the example shown in FIGS. 3 and 4, an outward flange 11 is formed on the outer end 8 of the tubular body 2 of the spark arrester 3, and this flange 11 is connected to the end of the tail pipe 4. By sandwiching between the stepped portion 12 formed in the portion and the head portion 10 of the screw 9, the tubular body 2 is held and the spark arrester 3 is prevented from falling off. However, by loosening the screw 9 as needed, the spark quare tester 3 can be easily removed, repaired and inspected, or replaced with a new one.

[0010]

[Effect of the device]

 According to the exhaust silencer of the present invention having the above-described structure, the spark arrester can be attached and detached from the opening side of the tail pipe, and the attachment and detachment can be prevented by the screw that prevents the tubular body of the spark arrester from coming out. It is very easy to carry out by attaching and detaching, and the cylindrical body of the spark quarester is securely clamped between the step portion of the tail pipe and the head portion of the screw screwed into the tail pipe. Therefore, there is no danger of accidentally falling off and it is highly safe to use.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an embodiment of an exhaust silencer of the present invention.

FIG. 2 is a front view of the portion shown in FIG.

FIG. 3 is a sectional view of a main part of another embodiment of the exhaust silencer of the present invention.

FIG. 4 is a front view of the portion shown in FIG.

FIG. 5 is a sectional view of an example of a conventional example.

FIG. 6 is a cross-sectional view of another example of the conventional example.

[Explanation of symbols]

 1 Bag-shaped net body 2 Cylindrical body 3 Spark arrester 4 Tail pipe 5 Opening portion 6 Inner end 7, 12 Step portion 8 Outer end 9 Screw 10 Head 11 Flange

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[Procedure amendment]

[Submission date] June 15, 1992

[Procedure Amendment 1]

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Claims (3)

[Scope of utility model registration request] 1. An exhaust silencer comprising a spark quare arrester exposed inside from a tail pipe of the exhaust silencer, wherein the spark arrester (3) is a bag-like mesh body (1).
And the tubular body (2) attached to the opening (5) of the bag-like net body (1). The tail pipe (4) is provided to prevent the bag-like net body (1) from falling off. ) And the head portion (10) of the screw (9) screwed into this tail pipe (4), the tubular body (2) is Exhaust silencer that is sandwiched. 2. The exhaust silencer according to claim 1, wherein the step portion (7) is configured to abut against an inner end of the tubular body (2). 3. An outward flange (11) is formed on the outer end of the tubular body (2), and the step (12) and the head of the screw (9) are formed through the flange (11). The exhaust silencer according to claim 1, wherein the tubular body (2) is sandwiched between the exhaust silencer and the (10).